High pressure boiler



April 5, 1932 0 H. HARTMANN 1,852,302

HIGH PRESSURE BOILER Filed July 1, 1930 2 sheets sheet l 35- 1 INVENTOR.

A TTORNEY.

April 5, 1932. Q HARTMANN 1,852,302

HIGH PRESSURE BOILER Filed July 1, 1950 2 Sheets-Sheet 2 IN VEN TOR.

A TTORNEY.

Patented Apr. 5, 1932 UNITED STATES PATENT OFFICE o'r'ro H. HARTMANN, or CASSEL-WILHELMSHOHE, GERMANY, ABSIGNOR TO THE surna- HEATER COMPANY, or nnwyonx, n. Y.

HIGH PRESSURE BOILER Application filed July 1, 1930, Serial No.

The subject-matter of this invention is a high pressure boiler for locomotives, locomobiles and similar devices with water tube fire-box and a preheating boiler. The latter may also generate low pressure steam at higher ratings. The high pressure portion may be arranged for either direct or indirect steam generation.

In accordance with the invention, the portion of the high pressure boiler lying be tween the fire-box and the preheating boiler and consisting of water tubes secured to upper and lower headers is given such shape that the forward end of the upper header or headers is supported on the preheating boilor whereas the rear end is connected to the upper headers by means of separate supporting or anchoring tubes. In this way a firm support for the middle portion of the boiler is provided without, however, interfering with its free expansion and contraction.

Furthermore, the shocks and vibrations arising from the movement of the locomotive are not transmitted to the water tubes or their joints to the headers, so that a loosening of the joints from these shocks need not be feared.

A particularly advantageous form is possible if the water tubes are connected at their lower ends to a single central longitudinal header or collector and bent laterally from it toward the lateral upper collectors so that there are formed tight walls both at the sides and at the top and bottom. In this case some water tubes may be omitted on one side of the boiler and a pocket shaped space be thus provided inside of the water tubes into which a superheater can be inserted from the side whose heating surface will then be surrounded by water tubes on five sides, one side remaining open.

The drawings show an illustrative form of this inventive idea in connection with a high pressure locomotive boiler. Fig. 1 shows a portion of the boiler in horizontal longitudinal section; Fig. 2 shows a vertical longitudinal central section, and Fig. 3 a crosssection on line III-III of Fig. 2.

As an illustrative example there has been 465,099, and in Germany July 15, 1929.

chosen a high pressure locomotive boiler with indirect generation of the o crating steam. The tire-box of this boiler is ormed of water tubes 1 which form the lateral walls and the roof of the fire-box and contain the heat carrier for the indirect generation of the working steam. They are connected to a lower ring-shaped water chamber 2 and two upper intermediate receiving headers 3 arranged on each sideand extending over the whole length of the water tube boiler. From these headers or drums 3 the steam of the heat carrier which has been generated is conveyed to the serpentine heating elements 4 located in the upper drum 5. The condensate of this heating steam returns to the lower water chamber 2 through downcomers lying on the outside beyond the risers.

Communicating with the fire-box is a combustion chamber which is surrounded and traversed by the water tubes 6 which communicate with the lower drums 7 and with the upper lateral intermediate drums 3. The lower drums 7 are connected to the ring chamber 2 of the fire-box through the transverse header 8 and pipes 9. Thus the tubes of the combustion chamber are also made part of the circuit of the heat medium. The portion of the water tube boiler beyond the combustion chamber consists of water tubes 10 which communicate at their upper ends with the lateral intermediate drums 3 and at their lower ends with a longitudinal header or drum 11 arranged centrally of the locomotive. As may be seen from Fig. 3, these tubes are bent from the intermediate drums 3 toward the central drum 11 in such a way that they form tight walls both at the sides and at the top and bottom. 12 are downcomers which convey the condensate of the heating steam from the heating elements 4 in the drum 5 back to the central drum 11. The rear end of the drum 11 is connected to the upper intermediate drums 3 by means of the carrying or anchoring tubes 13, whereas the front end of the drum 11 is suspended from the preheating boiler 14 forming the forward part of the locomotive, the support being in the form of a socket 14a secured to the lower side of the preheating boiler 14. The water tube boiler serves to generate high pressure steam, and the preheating boiler which is shown in the formof a fire tube boiler serves ordinarily as a feed-water heater for the high-pressure 5 boiler but may be called on to generate low pressure steam when the locomotive is worked hard. In the portion of the boiler between the combustion chamber and the preheating 7 section 14, pockets are provided for introduc 10 ing superheaters and 16 from the side by omitting the water tubes 10 on one side of the locomotive as may be seen in Fig.7 3. These pockets may be open alternately at one side of the locomotiveand the other. The super- 15 heater 15 may by way of illustration be the first superheater and the superheater 16 the reheater of the working steam. In addition,

a further .superheater 17 is provided for the steam used in operating auxiliaries such as 9 feed water pumps.

,1 claim:

1. A high pressure boiler comprising a water-tube fire-box, a preheating section, and an intermediate high-pressure boiler section between the two including upper and lower drums and Water tubes connecting them, characterized by the fact that the front end of the lower drum is supported from the preheating section in such a way as to prevent longitudinal movement While its rear end is supported by special anchor water tubes connecting the upper and lower drums; whereby the intermediate section can expand and contract independently of the remainder of the boiler, While loosening the joints by jolts is prevented.

2. A high pressure boiler according to claim 1, the preheating section being in the form of a fire-tube boiler, and the support for the front end of said drum being secured to the lower side of the rear lower end of the preheating section.

3. A high pressure boiler according to claim 1, the upper drums of the intermediate section being continued'backward and having the upper ends of the water tubes of the fire box section secured to them.

OTTO H. HARTMANN. 

